Contents

module Faye
  class WebSocket

    class Draft76Parser < Draft75Parser
      def version
        'hixie-76'
      end

      def handshake_response
        env = @socket.env
        signature = handshake_signature(env['rack.input'].read)

        upgrade =  "HTTP/1.1 101 Web Socket Protocol Handshake\r\n"
        upgrade << "Upgrade: WebSocket\r\n"
        upgrade << "Connection: Upgrade\r\n"
        upgrade << "Sec-WebSocket-Origin: #{env['HTTP_ORIGIN']}\r\n"
        upgrade << "Sec-WebSocket-Location: #{@socket.url}\r\n"
        upgrade << "\r\n"
        upgrade << signature if signature
        upgrade
      end

      def handshake_signature(head)
        return nil if head.empty?
        env = @socket.env

        key1   = env['HTTP_SEC_WEBSOCKET_KEY1']
        value1 = number_from_key(key1) / spaces_in_key(key1)

        key2   = env['HTTP_SEC_WEBSOCKET_KEY2']
        value2 = number_from_key(key2) / spaces_in_key(key2)

        @handshake_complete = true

        Digest::MD5.digest(big_endian(value1) +
                           big_endian(value2) +
                           head)
      end

      def open?
        !!@handshake_complete
      end

      def parse(data)
        return super if @handshake_complete
        handshake_signature(data)
      end

      def close(code = nil, reason = nil, &callback)
        return if @closed
        @socket.send([0xFF, 0x00]) if @closing
        @closed = true
        callback.call if callback
      end

    private

      def parse_leading_byte(data)
        return super unless data == 0xFF
        @closing = true
        @length = 0
        @stage = 1
      end

      def number_from_key(key)
        key.scan(/[0-9]/).join('').to_i(10)
      end

      def spaces_in_key(key)
        key.scan(/ /).size
      end

      def big_endian(number)
        string = ''
        [24,16,8,0].each do |offset|
          string << (number >> offset & 0xFF).chr
        end
        string
      end
    end

  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
faye-websocket-0.4.7-java	lib/faye/websocket/draft76_parser.rb
faye-websocket-0.4.7	lib/faye/websocket/draft76_parser.rb